It looks like you have another die crack coming off the back of the eagle's head and going through the bottom portion of the M in UNUM. This is a fairly common area for a die crack in this series.
This coin was awesome, almost wish I hadn't sold it years ago. Direct Lighting Diffused Lighting The intensity of the blue toning on the reverse was staggering.
I'll play. Haven't decided what the splotch at 10:00 on the 1959 is yet; seems like an acid encounter but the rest of the coin is pretty nice and original.